Forensic Examination of Counterfeit Banknotes: Classification Principles and Analytical Procedures

This study examines the forensic classification and identification of counterfeit banknotes through an integrated analysis of empirical observations obtained during field and laboratory investigations. Particular attention is given to the procedural workflow of forensic examination and to the complementary use of macroscopic, microscopic, optical, and physicochemical methods. Preliminary field assessments were conducted using document examination loupes and other optical magnification devices, while laboratory investigations employed advanced analytical systems and specialized software to characterize the substrate, printing inks, graphic elements, and security features. The findings demonstrate that reliable counterfeit banknote identification cannot be based solely on visual inspection. A multidisciplinary approach integrating morphological, optical, and compositional evidence is essential for distinguishing sophisticated counterfeits from genuine banknotes and for formulating scientifically robust forensic conclusions. This study also highlights the need for continuously updated examination procedures in response to the increasing technological sophistication of banknote counterfeiting.